Plug receptacle



July 29, 1930.

n' Mlllllgllllllllllllllllwllu H. HUBBELL PLUG RE CEPTACLE Filed NOV. 8,A 1927 y Illllllllllllllllllllllllmllllll ,Z a 7:1 6' /7 y gime/141301;

Patented July 29, 1930 UNITED. STATES PATENT OFFICE HARVEY HUEBELL, or nnrnanr'onr,` coNNEc'rIoUr; Loum n. HUBBELL Exncurmx OF SAID HARVEY HUBBELL, DECEASED PLUG nEcEr'rAcLE Application mea november 8,1927. serial No. 231,547.

This invention relates to plug receptacles -for attachment plug caps and has for an object to provide a simple and easily assembled structure which will require the minimum amount of expensive insulating material.

-Certain of the composition materials used for molding insulating bodies for this type of article are of relatively lowcost, but some of the newer phenolic condensation products, such as bakelite, make stronger and more attractive looking plugs, but this material is relatively quite expensive. I have, therefore, devised a plug receptacle in which the amount of insulatlng material required for each plug is greatly reduced over the type of plugs ordinarily in general use 'and I can, therefore, effect a material saving in the amount of material used, especially where the plugs are made in 'quantities, and can thus make the caps of better material without increasing their cost to the'consumer.

With the foregoing' and other objects in view,` I have devised the construction lillus- `trated iii the accompanyingA drawing forming a part of this specication. In this drawing,

Fig. 1 is a longitudinal section through the ylug receptacle substantially on line 1--1 of ig. 2. a i

Fig. 2 is a side elevation thereof.

Fig. 3 is a transverse section substantially on line 3 3 of Fig. 1.

Fig. 4 is an end elevation of the screw shell contact. v

Fig. 5 is a side elevation of theinsulating body member but showing the contact securing rivet in position, and

Fig; 6 is an end elevation thereof looking from the bottom of Fig. 5. My improved plug receptacle includes the insulating body member 10 having longitudinally extending passages 11 andq12 in which are placed the spring contacts 13 -and' 14 respectively.v These passages also open through the front wall of the body forffinsertion of the contact blades of an attachment plug cap, not shown. For use in the standard screw. shell sockets the innerl edgeof the liange 15 of the body must bea given distance from the tipor central contact 16 in order to make the proper contacts in the sockets`- wardly from the central contact. This re'- i quires a relatively long insulating body and .requires considerable insulating material.

In the-present device, however, I have devised a construction whereby the central contact may project a considerable distance from the inner end of the body` and have shifted the screw shell contact backwardly away from the central contact sothat I can materially shorten the .insulating body, vthus effecting quite a considerable' saving in the amount of insulating material required. I have also devised a means whereby the contacts can be mounted on a post projecting from the inner end of the body so that the outer walls of the body can be still further shortened effecting a still further saving in the amount of material required.

Referring to the drawing the body 10 has acentral post 17 projecting from its inner end and secured in this post, preferably by .molding lit into the material, is a securing element'18, in the present-,construction in the form of a hollowrivet which as shown projects a considerable distance from theV innerend 'of the post. This .post is provided with shoulders 19 spaced inwardly somewhat toward the body 0f the cap -from the end of the post, and I mount on one ofthese shoulders a second electrical contact, and at its closed the screw shell contact 20.A This element is of j endis provided with an opening 22 having i a substantially rectangular section 23 in theV side thereof to receive the similarly shaped projecting end portion 24 of post 17 of the body member, and therefore, the end Wall of this screw shell seats on one of the shoulders 19, as shown in Fig. 1. As this shell is firmly mounted on this post and secured to` this shoulder as will be Ymore fully described later, it is not necessary to extend the outer wall of the body to the inner end of this shell as in the old constructions. The outer walls of the bodyare, therefore, shortened so as to extend only a short distance into the open end of the screw shell, as shown at 25. It will be obvious this arrangement effects a considerable saving in the amount of material required, while the end ofthe body is suiicientf ly embraced by the walls ofthe screw shell so that the shell is rigidly held in the proper position. The end of the shell also has a slot 26 through which the angular end portion 27 Yof the contact 13 may project, and it'seats on the outer side 'of this end wall against which it is held to provide good electrical contact by pressurefrom the insulating disc 28. The other contact.14 extends through the disc 28 and has a laterally extendingfoot 29 resting against the end of post 17, and it is preferred that this foot be perforated for passage of the securing rivet 18. Mounted on the rivet and embracing the projecting portion thereof isa metal sleeve y30, and its vinner end is preferably anged so as to pro- -vide a good contact for the foot 29. Enclosing this sleev is a central member 31 which is preferably substantially conical with its base resting against the disc 28 and its small-- er end embracing the rivet and engaging the outer end of the sleeve 30. If now the free end of the rivet 18 is s unl over or riveted over as shown at 32, it will secure all the elements in position on the body. It -will presstheV conical member 31 against the disc 28 and clamp the screw) shell 20 against the' shoulder on the central post 17 and it will also form a good tight contact between the angular end 27 ofthe contact 13 and the screw shell. The riveting over of the-head of the rivet also presses the member 31 against the Vend of the sleeve 30 and clamps the base of this sleeve against the foot 29 and contact 14.

"It, therefore, clamps this foot against the end of the post besides pn'oviding a good electrical contact between this contact and the sleeve and between the sleeve and the central contact and the rivet. Therefore, the single operation of spinning over or riveting over the ened over Ythe old structure, and therefore,

.memben this effects another material change, in the` amount of material required for `thebody Before assembling the angle between the body of the contact 14 ,and the foot 29 is greater than a right angle so that when the securing rivet lis set and the foot clamped against the end of the post the contact wil be placed under some'tension and member Vhaving longitudinal passages its free end held thereby against the side of its passage. The same'is true on contact 13 except that here the angle should be less than a right angle. AOn the opopsite sides of the post 17 between the passages 11 and 12 sockets or chambers 33 may be rovided to still further reduce the amount o material used in the body. I have, therefore, provided a structure which greatly reduces the amount 'of material required for the body member, and

have done this without increasing the assem bling operations over what are required in the old types of these devices.

I-Iaving thus set forth the 4nature of my invention,what I claim is:

1. Ina plug receptacle, an insulating body member having longitudinal passages for contact blades and a central post extending beyond its inner end provided with a shoulder adjacent its free end, a securing rivet secured in the end of the post, a screw shell contact resting on said shoulder and extending to and embracing the inner end of the body member, a spring contact electrically connected withthe screw shell and extending into one of said passages, a central contact secured to the post by said rivet, and a second spring contact in the other passage and electrically connected with the central contact.

2. In a plug receptacle, an insulating body member having longitudinal passages for contact blades and' a central post extending beyond its inner end, a screwshell contact mounted on Vsaid lpost adjacent its free end and-extending to and 'embracing the inner end of the body, acontact in one of the pas-` sages and connected to said shell, a rivet secured in the end of the post and projecting therefrom, a contact in the other passage and having an extension resting on the end of the post, a sleeve embracing the rivet and engaging said extension at one end, and a central contact engaging the other end'of the sleeve, said rivet serving to secure the central contact and press the sleeve against the extension to form an'electrical connection between the central contact'and the contact in the second passage.

In a plug receptacle, an insulating bofdy or contact blades and a central post projecting from its inner end, a securing rivetvprojecting from the inner end of thepost, a contactV in one of the passages having a perforated foot-to receive said rivet and resting against the end of the post, a metal sleeve embracing the `rivet and engaging said foot, and the free end of the rivet being turned over to press the sleeve against the foot andclamp it against the post. l.

4. In a plug receptacle, an insulating body member having longitudinal passages forI contact blades and a central post projecting v from its inner end having a Shoulder adjacent its free end, a screw shell resting on said shoulder and extending to embrace the inner end of the body, a contact in one of the pase sages extending through the end ofthe screw shell and having an end portion engaging the outer surface of said shell, an insulating disc' on the outer side of said end wall, a securing rivet extending from the end of the post, a contact in the other passa e having a foot provided with an opening or said rivet and resting against the end of the post, a metal sleeve on the post engaging said rivet, a central contact resting at its base onl said disc and having an opening to receive said rivet, and the end of the rivet being turned over to clamp said elements to each other and to the body. f

5. In a plug receptacle, an insulating body having longitudinal passages for contact blades, a screw shell contact mounted on said body, a Contact in one of the passages connected t said shell, an insulating disc engaging the inner end of the shell, a rivet secured in the inner end of the body and proj ecting therefrom, a contact in the other passage having- .an extension resting against the end of the ubody, a sleeve embracing said rivet and engaging said extension at oneend, and a substantially conical member engaging said sleeve at the other end and 'resting at its base on the insulating disc, the free end of the rivet being turned over against said member to secure the contacts and 4said member to the body. A In testimony whereof I aix my signature HARVEY HUBBELL. 

